Minimal post-processing. This challenge is mainly an exercise in straight photography.

Naturalistic HDR and exposure blending acceptable.

Capture date rules:

No restrictions.

Additional rules:

Submit a photograph with a building as your primary subject.

Use the composition of the building itself as a guide to your own composition.

Dawn and dusk are classic times of day for architectural photography, especially when the light of the sky precisely balances artificial lighting in the windows of the building.

Perspective distortion can be particularly displeasing. Keep the sensor plane of your camera precisely vertical; you may have to shoot from a greater distance, or use a wider-angle lens, or shoot from a higher position.

Camera tilt will look good if you are shooting up the side of the building.

Perspective control lenses and tilt-shift camera movements are classic methods of keeping the vertical lines of the building vertical in your image; alternatively, you can correct for distortion in post-processing.

A high camera position can look particularly good, especially half the height of your subject.